LD 790 Fluid Detector Controls (800) 541-4056

LD 790 SERIES

FLUID DETECTOR CONTROLS

LD 790 - Fluid Detector Controls

Reliable

	Low Cost
	115 VAC Input with Transformer Insolation
	Heavy Duty 15 Amp Form C Output Contacts
	Probe Signal: Isolated Low Voltage AC with Short Circuit Protection

Versatile

	Selectable Operating Mode (Upper and Lower Level or Single Point Control)
	Unit Temperature Operation -29° C to 71° C
	Adjustable Probe Sensitivity
	Adjustable Sense Delay for Splash Override

Applications

Water Level Sensing - Ice Making Machines - Coolant Level - Boilers - Wet Soil Detectors - Water in Oil Sensors (static state) - Tank Level Control - Loss of Fluid Detectors - Overflow Detectors - Automatic Watering Systems - Hot or Cold Beverage Dispensers - Sump Pumps & Overflow Detectors

Operation

The LD Series Fluid Controls operate by detecting the electrical resistance of fluids. A sensitivity adjustment is provided to compensate for different resistance levels, allowing the LD controls to sense most conductive fluids. (City Water, Sea Water, Water and Glycol, Water and Oil, Coffee, Wet Soil, Weak Acid, Copper Sulphate, Beverages)

A mode switch selects operation either as an upper or lower level control or as a single level detector. A splash delay is also built in to override splashing in a tank.

Specifications
Operating Voltage	24 VAC, 115 VAC or 240 VAC
Maximum Supply Variation	+/- 10%
Output Contact Rating	SPDT 15 Amp Non-inductive (rated 1/2 hp 125 VAC)
Ambient Operating Temperature	-29° C to 71° C
Output Contact Type	SPDT Form C
Power Consumption	3 Watts
Probe Sensing Distance	Up to 50 feet
Maximum Probe Current	1 mA
Maximum Probe Voltage	6 VAC
Resistance Detection Range	up to 1 Meg ohm
Splash Delay Adjustment Range	100 ms to 5 sec.
Probe Sensitivity Adjustment Range	8k to 1 Meg ohm
Termination Connection	Barrier type strip up to 12 AWG
Mounting Type	6-32 threaded standoffs
Probe Type	RBE DP-1000 or equivalent
Operating Modes	Upper/Lower level control or single unit level control

See connection diagram for description on control action for single level or dual level control. LD 790 Diagram

For Application Assistance, Quotation, Product Specifications, or Custom Design Call 1-800-541-4056